The invention relates to the field of welding auxiliary equipment, in particular to a novel thermal insulation welding rod barrel. The novel thermal insulation welding rod barrel comprises a barrel cover, a barrel wall, a thermal insulation layer, a rotation connecting device, a connecting rod, a bottom plate and a rotating shaft; the external edge of the barrel cover is rotationally connected with the barrel wall through the rotation connecting device; the rotation connecting device is provided with a cam; the thermal insulation layer and a damp-proof layer are arranged on the inner side of the barrel wall; the connecting rod is rotationally connected with the bottom plate; and the bottom plate is provided with the rotating shaft. The thermal insulation welding rod barrel solves the problems that welding rods can not be taken out of the existing welding rod barrel conveniently and a welding rod barrel cover can not be closed automatically.